Re: [PATCH] selftests: ftrace: Use md5sum to take less time of checking logs

[Shuah Khan]

On 06/27/2017 04:28 AM, Masami Hiramatsu wrote:
> Use md5sum so that it takes less time of checking
> trace logs update. Since busybox tail/cat takes too
> long time to read the trace log, this uses md5sum
> to check whether trace log is updated or not.
> 
> Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>

Applied to linux-kselftest next for 4.13-rc1

thanks,
-- Shuah

> ---
>  .../test.d/ftrace/func_traceonoff_triggers.tc      |    6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc b/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc
> index 9cf3852..7a9ab4f 100644
> --- a/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc
> +++ b/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc
> @@ -103,11 +103,11 @@ if [ $on != "0" ]; then
>      fail "Tracing is not off"
>  fi
>  
> -line1=`cat trace | tail -1`
> +csum1=`md5sum trace`
>  sleep $SLEEP_TIME
> -line2=`cat trace | tail -1`
> +csum2=`md5sum trace`
>  
> -if [ "$line1" != "$line2" ]; then
> +if [ "$csum1" != "$csum2" ]; then
>      fail "Tracing file is still changing"
>  fi
>  
> 
> 
>